21014525154 has 128 divisors (see below), whose sum is σ = 49912676352. Its totient is φ = 5774146560.

The previous prime is 21014525153. The next prime is 21014525167. The reversal of 21014525154 is 45152541012.

It is a super-2 number, since 2×21014525154² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21014525153) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 67138902 + ... + 67139214.

It is an arithmetic number, because the mean of its divisors is an integer number (389942784).

Almost surely, 2^21014525154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21014525154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24956338176).

21014525154 is an abundant number, since it is smaller than the sum of its proper divisors (28898151198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21014525154 is a wasteful number, since it uses less digits than its factorization.

21014525154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 21014525154 in words is "twenty-one billion, fourteen million, five hundred twenty-five thousand, one hundred fifty-four".